Collaborative Perinatal Project

The Collaborative Perinatal Project (abbreviated CPP), also known as the National Collaborative Perinatal Project (or NCPP), was a multisite prospective cohort study designed to identify the effects of complications during either pregnancy or the perinatal period on birth and child outcomes, especially neurological disorders such as cerebral palsy. It was conducted by the National Institute of Neurological and Communicative Disorders and Stroke on over 55,000 pregnant mothers at 12 sites across the United States from 1959 to 1965. It is one of the largest and broadest epidemiological studies in American history; according to Mark Klebanoff, "No U.S.-based study of pregnancy and childhood conducted before or since has matched its size, breadth and depth".